The avionic compartments have: - heat and sound insulation, - maintenance lighting, - air-cooled racks for the electrical and electronic equipment and their related units.

A. Write notes only to give content, not commands.

B. Write notes only to give information, not instructions.

C. Write cautions only to give information, not orders.

A. Use a hole instrument to examine the turbine internally.

B. Use a borescope to examine the combustor internally.

C. Use a hole instrument to examine the combustor externally.

A. The following procedures will prevent deterioration of aircraft structural coatings or system components.

B. The procedures that follow will prevent the deterioration of the airplane structure, finish, or system components.

C. The delamination of the airplane structure, finish, or system parts will be blocked by the procedures listed below.

A. The generators supply a three-phase voltage. The frequency of this voltage increases when the generator rotor speed increases.

B. The rate of the three-phase voltage generated by the generator is proportional to the rotational speed of the generator rotor.

C. The frequency of the three-dimensional voltage produced by the generator is changed with the rotational speed of the generator rotor.

A. 戴上氧气面罩并进行呼吸，确认其供氧正常。

B. 在佩戴氧气面罩前进行深呼吸，确认血液中氧气充足。

C. 为确保供氧正常，请不要摘下氧气面罩并进行呼吸。

A. 为了便于旅客和机组人员在紧急情况下快速撤离,所有主要旅客门也可以作为紧急出口.

B. 为了机组人员在紧急情况下从快速通道撤离,所有这些主要的门都应作为紧急撤离出口.

C. 为了便于有紧急事务的旅客快速离开，所有主要旅客门都可以作为紧急出口.

A. Make sure that the latch is fully engaged.

B. Make sure that the knob is fully engaged.

C. Make sure that the latch in full engaged position.

A. Visual difference is acceptable between the previous surface and the new surface.

B. There should be no visual difference between the initial surface finish and the new surface finish.

C. It is forbidden to have acoustic difference between the former surface finish and the new surface finish.

A. 无需从绞盘（27）上拆下铭牌（33）。

B. 无需从法兰（27）上拆下铭牌（33）。

C. 无需从法兰（27）上拆下名字盘（33）。

A. 所有射程距离应以海里为单位表示。

B. 所有航程值应以海里为单位。

C. 所有射程距离应以海里为单位。